Collapsible tube container



June 7," 1938. H. QUITTNE'R GOLLPSIBLE TUBE CONTAINER L Filed Feb. -l, 1937 1V @zdf/7er for;

Patented June 7, 1938 PATENT- OFFICE coLLAPsiBLE TUBE CONTAINER Heinrich Quittner, Vienna, Austria, assigner to the firm Lwit & Comp., Vienna, Austria Application February 1, 1937, Serial No. 123,498

' In Austria February 21, 1936 1 claim.

This invention relates to collapsible tube containers made from paper. Tubes of this description made from paper are not suitable for the majority of purposes on account of their poor resistance to mechanical and chemical strains, and are therefore precluded lfrom mostV uses. In accordance with the present invention, however, tubes of this type can be rene wall is also rendered highly resistant to chemical attacks of all kinds, since rubber or the like is not attacked by the substances normally packed in collapsible tube containers, such as 25 aqueous emulsions, acids, alkalies, soaps, and the like. 'A film-like lining of the kind provided by the present invention also has the elect of completely sealing up all joints and crevices which result inevitably from the process of manufac- 30 turing the tube, and the contents of the tube are consequently saved from theaccess of air and from becoming dry.

If desired, the tube may also be given an outside coating of moisture-repelling character, for 35 example a coatingV of varnish or the like, or enamel paint, and in this manlner rendered proof against attacks of outside i'nuences.

The paper tubes envisaged bythe present invention may be manufactured by methods known 40 per se, it being preferable in accordance with the invention to employ, as adhesive for the paper in such manufacturing, yielding and elastic material such as rubber solutions, rubber' emul- I sions, rubber dispersions, or the like, and pref- 45 ,erably latex or the like. In this manner the Jstuck joints and seams are rendered elastic and less liable to become damaged or leaky, as com-7 pared with`the stiifness of the stuck surfaces and seams when glue, paste, or the like is used as 50 adhesive for the described purpose.

- In the drawing, Fig. 1 shows a cross section of a tube stock which may be used in carrying out the invention; Fig. 2 illustrates a partially formed end closure in section; Fig. 3 shows in 55 elevation a suitable closure cap and its threaded fitting; Fig. 4 shows in section the .completed end structure of a collapsible tube produced ac-- cording to the invention.

Tubes in accordance with the invention may conveniently be manufactured by rolling or wind- 5 ing adhesive-covered paper to form aftube, in such av manner that the wall thickness of the resulting tube is at least twice the thickness of the paper used. The tube can then be relied on not to burst even when the pressure setup by squeezing is relatively great. A paper tube l (Fig. l) of this description stuck together with latex or the like, which may be manufactured in any desired lengths and cut up into pieces of the length required to form a collapsible tube container, is then upset at one end (for instance on a mandrel), and on the upset marginal portion 2 discs 3 and li (Fig. 2) are then placed on the insidel and on the outside, the disk lying outermost in the nished tube being made preferably of metal foil. The best method to adopt is to rst apply the inner disc 3 to the mandrel,

then to fit the paper tube thereo'ver, and nally to apply the outer disc d, after which the inturned portion of the tube is united to the two discs by means of an adhesive, preferably latex, under the application of pressure and heat. I nto the tubular piece thus produced there is then .L inserted a. disc-shaped member 5 of composition (for instance bakelite or the like) or metal comprising the screw threading for the -closure cap 1, in such a manner that the threaded extension 6 of this member 5 projects out of the tube (Fig. 4). The tubel thus formed, which is open at the one end, is then provided with a nlm-like lining of latex or the like, for instance by pouring elastic yielding material, preferably latex or the like, through the tube after rendering the latter open at both ends by removal of the screw cap, with the result that a film 8 (Fig. 4) 40 becomes formed on the inside of the tube Wall, thus completely sealing the inside of the tube and all the joints therein.

A lm such as the lm 8 produced in the described manner clearly di'ers from an ordiy45 nary impregnation in that it does also admit of detachment from the paper wall of the tube, whereas the usual impregnating agents such as paraln, linseed oil, and the like penetrate intothe paper libres.

movement the lm also forms an elastic rein- 55 Like a rubber tube, this lm can be subjected to very considerable strains n forcement of the tube and enhances its softness and suppleness.

The open end of the tube may be closed in the known manner by folding or the like.

The nished tube may also be Waterproofed on the outside by the application of a suitable coating.

Tubes manufactured ir. the described manner not -only provide a fully equivalent substitute for metal collapsible tube containers, butmay also be used in cases'in which metal tubes may not be used on'account of their chemical and other properties.

The use of paper instead of the commonly used metals, such as more particularly tin, also enables the manufacturing of the tubes to be veryconsiderably cheapened.

at one end, applying reinforcing members to 5 the inner and outer surfaces of the reduced portion of the body, fixing an outlet element to the reinforced end of the body and applying a coating on the inner surface oi the body in the form of a film-like lining of an elastically 10 yielding material capable of being subjected to chemical and mechanical strains independently of the paper body.

HEINRICH QUITTNER. 1s 

